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Four Unique Business Start-Ups

Exchange Bar and Grill

Exchange Bar and Grill

Exchange Bar and Grill

In this New York restaurant, you can indulge your amateur arbitrage dreams over a burger and beer. Food and drink prices at the Exchange Bar and Grill are based on supply and demand -prices fluctuate (though usually within a two dollar range) depending on demand. The more popular a dish, the cheaper it is, the fewer the orders, the pricier it'll be. More corn chip than blue chip, founders Damon Bae and Levent Cakar opened the restaurant on April 1st. (Pic: Exchange Bar and Grill)

Four Unique Business Start-Ups

One Billion Minds

One Billion Minds

One Billion Minds

Here's a company that is using crowdsourcing to solve world problems. One Billion Minds challenges student and alumni crowds from universities worldwide to come up with innovative solutions to real world problems from climate change to developing a better method for garbage disposal problem in Kolkata. Clients can present a challenge for the best minds to solve and innovators can pitch ideas for prizes- one of which may be an opportunity to interview with the client company. Oh, and the chance to change the world. (Pic: One Billion Minds)

Four Unique Business Start-Ups

Readeo

Readeo

Readeo

If you have children of a certain age and you're away and you want to keep-up the bed-time stroy telling ritual, Readeo is the perfect online portal for you. This Chicago based company, started by Coby Neuenschwander offers, an online portal which integrates digitised picture books with webcam communication, allowing adults and children to share stories while seeing and interacting with each other. A diverse library is available on the site and it also gives you the opportunity to customise your own digital library. (Pic: Readeo)

Four Unique Business Start-Ups

ParkAtMyHouse

ParkAtMyHouse

ParkAtMyHouse

Anyone who lives or works in a city will know the frustration of driving in circles in search of a parking spot.This business ticks that box,while helping owners of empty car parking spots earn a bit of money. Founded in 2006 by Anthony Eskinazi,Park At My House plays matchmaker between parkers and property owners, bringing together those looking for parking spaces and those like Susan Omar, photographed here, who rents out her driveway. (Pic: ParkAtMyHouse )